About the product's longevity, it is too soon to talk about potential issues. I'm happy with these, even though they're five times more expensive than Sony's h headphones. Ear in two high resolutions as well as SBH-90C. There is no doubt that the sound produced by the WI-C310 is less detailed and more compressed. Additionally, there is a marginal reduction in the amount of bass. The sound is on a flat 4k, there are no wild jambs directly (the sound is analogous to all ears + - by 1-1.5k), the level is XBA-155/255. The correct fit has a significant impact on sound quality. You should choose a position that is comfortable for you, but you should also be aware that the sound quality will improve the deeper the device is placed in your ear (up to a reasonable measure). Because the headphones have a narrow channel and the speaker box is located in close proximity to the pad, it seemed uncomfortable at first to insert them all the way into the ear canal. Although it is strange, it does not make me uncomfortable because I have never experienced anything like this before. I rated it 5 ku, and it completely lived up to my expectations. P.S. An interesting fact is that Sony used the same pads in both the model for 500r and the model for 150k. In my opinion, the pads that Sony uses are the most comfortable, versatile, and pleasing to the ear.
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